blog posts Illinois sportfish recovery a result of 1972 Clean Water Act, scientists report Oct 18, 2017 11:30 am by Tricia BarkerNatural History Survey Share on Facebook Tweet Email Researchers from the Illinois Natural History Survey have surveyed fish in the Illinois River since 1957. Here, the team uses electricity to stun the fish for capture. Photo by Aaron Yetter Images Populations of largemouth bass, bluegill, catfish and other sportfish are at the highest levels recorded in more than a century in the Illinois River, according to the Illinois Natural History Survey, which has surveyed fish there since 1957. Share on Facebook Tweet Email
